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Research Journal of Parasitology
  Year: 2020 | Volume: 15 | Issue: 1 | Page No.: 20-30
DOI: 10.3923/jp.2020.20.30
 
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Ecological and Biological Studies of Certain Predatory Insects of Aphid Aphis craccivora (Koch.) On Cowpea

Ahmed S. Jabbar , Mohamed F.M. Zawrah , Said A.M. Amer and Ahmed A.A. Saleh

Abstract:
Background and Objective: Cowpea and faba bean are commonly cultivated in Egypt. These crops are affected by the insect attack especially aphids, for which different insecticide are used which are effecting the crop badly. This article aims to study the population density of the cowpea aphid, Aphis craccivora and its associated predators on cowpea fields. Materials and Methods: These experiments were carried out to survey, seasonal abundance of A. cracciovra and its associated predators associated with A. craccivora and their relative densities, in Zagazig District during the 2 seasons 2018 and 2019. In addition, it was studied biological characters of C. undecimpunctata reared on A. craccivora. Results: Investigation reflect that seven species of predators were found. These predators were Coccinella undecimpunctata, Metasyrphus corolla, C. carnea, Scymnus sp., Orius sp., Cydoniavicinaisis and P. alfierii. Coccinella undecimpunctata was the dominant predator species with a rate of occurrence reached, 30.92%. C. carnea. represented the second one with a percent of 18.44% from the total numbers of predators found in the first season, C. undecimpunctata was the dominant predator species with a rate of occurrence reached (31.41%) from the total number of predators in second one. The duration period of the larval stage of the predator C. undecimpunctata when reared and fed on A. craccivora lasted 14.72±0.18 days. The predator female consumed a total average of 3135.1±39.12 individuals. The average number of eggs deposited per female was 256.6±11.69 eggs. Conclusion: Finally, predators could be recommended as biological control agents against this aphid A. craccivora under Egyptian conditions.
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How to cite this article:

Ahmed S. Jabbar, Mohamed F.M. Zawrah, Said A.M. Amer and Ahmed A.A. Saleh, 2020. Ecological and Biological Studies of Certain Predatory Insects of Aphid Aphis craccivora (Koch.) On Cowpea. Research Journal of Parasitology, 15: 20-30.

DOI: 10.3923/jp.2020.20.30

URL: https://scialert.net/abstract/?doi=jp.2020.20.30

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